docs: def get_wiki(self, section):
          """
          Returns a section of the wiki.
          Only for Album/Track.
          section can be "content", "summary" or
              "published" (for published date)
          """
  
          doc = self._request(self.ws_prefix + ".getInfo", True)
  
          if len(doc.getElementsByTagName("wiki")) == 0:
              return
  
          node = doc.getElementsByTagName("wiki")[0]
  
          return _extract(node, section)